y
sin 20° sin 40° sin 60° sin 80º = =
Answers
Answered by
3
Step-by-step explanation:
■ we know that
●2sinAsinB = cos (A-B) - cos (A+B)
●2cosAsinB = sin (A+B) - sin(A-B)
● sin(180-A) = sin A
now ,
■ sin20°•sin40°•sin60°•sin80°
● keep smiling &
always shining.............:)
Similar questions